Thats easy! Red back spiders are called 'red back spiders because they have a red (or sometimes dark orange) stripe on their back. they sometimes have a diamond slightly below that stripe aswell.
How many legs (on) a red back spider? if this is the question... 8 (eight) legs less if they have been crushed or ripped off
Tall
by humping
what are red back appearances
Redback, found in Australia
Yes
sometimes
Australia
not unless they have red on their back
what are red back appearances
Yes